What microscopy do i use: why are cells small, efficiency surface area to volume ratio. The small the cell it takes less time to diffuse. The cells are small therefore i can breathe in 0. 067s and if i have a large cell it will take me 78 days, it will be difficult to make equilibrium with oxygen. When one of the small cells stop functioning the other will take its place and wont make a difference. It has a size limit, that control what goes in out: made of proteins, largest proteins in the cell, nuclear localization signal for the molecules that go in. The ri(cid:271)oso(cid:373)es, they are on the er nd cytoplasm: there is translation in mitochondria, but not the translaton for the entire cell, ribosomes. That (cid:272)a(cid:374) (cid:373)ake protei(cid:374)s a(cid:374)d lipid: the components and environment to make lipids and proteins are different.